NEET BIOLOGY

Detailed explanation-1: -Recessive alleles only express their phenotype if an organism carries two identical copies of the recessive allele, meaning it is homozygous for the recessive allele.

Detailed explanation-2: -Finally, the genotype of an organism with two recessive alleles is called homozygous recessive.

Detailed explanation-3: -Homozygous means that the organism has two copies of the same allele for a gene. An organism can be homozygous dominant, if it carries two copies of the same dominant allele, or homozygous recessive, if it carries two copies of the same recessive allele.

Detailed explanation-4: -Recessive needing two identical copies of a gene to express a trait, written as a lower case letter a. Homozygous dominant having two dominant genes, AA. Homozygous recessive having two recessive genes, aa.

Detailed explanation-5: -Recessive alleles are denoted by a lowercase letter (a versus A). Only individuals with an aa genotype will express a recessive trait; therefore, offspring must receive one recessive allele from each parent to exhibit a recessive trait.